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Analog Devices Inc./Maxim Integrated DS26524G+
- Part No.:
- DS26524G+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 256-LBGA, CSBGA
- Datasheet:
-
DS26524G+.pdf
- Description:
- IC TELECOM INTERFACE 256CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
DS26524G+ from Maxim Integrated is a quad-channel T1/E1/J1 framer and line interface unit (LIU) IC supporting independent per-port configuration for long-haul and short-haul lines. It delivers 4× T1 (1.544 Mbps), E1 (2.048 Mbps), or J1 operation, integrated crystal-less jitter attenuation meeting ITU-T G.823 and ETSI ETR 12/13, and supports D4, ESF, G.704/CRC-4 framing - deployed in CSUs, DSUs, and telecom access switches.
For engineers reviewing the DS26524G+ datasheet, DS26524G+ pinout, DS26524G+ application, or DS26524G+ equivalent, key selection criteria include per-port framing flexibility (T1/E1/J1), software-selectable 75Ω/100Ω/110Ω/120Ω termination, receive-signal level indication (–2.5 dB to –44 dB), T1-to-E1 conversion capability, and H.100 (CT Bus) backplane interface compliance.
Technical Context
The DS26524G+ integrates four independent framer/LIU channels with dual-path crystal-less jitter attenuators compliant with ITU-T G.736, G.742, and G.823. Each channel supports selectable T1/E1/J1 line rates, framing (D4/SLC-96/ESF for T1; G.704/CRC-4 for E1), and signaling extraction/insertion via microprocessor or system interface.
Its clock architecture accepts external master clocks at multiples of 1.544 MHz or 2.048 MHz, internally adapting them for T1 or E1 usage in host mode. The device implements elastic stores, IBO multiplexing, and H.100 CT Bus compatibility for TDM backplane interconnect, with per-port LOS detection per G.775 and T1.231.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent T1/E1/J1 transceivers with full framer + LIU functionality per port |
| Data Rate Support | 1.544 Mbps (T1/J1) and 2.048 Mbps (E1); no external clock synthesis required |
| Framing Modes | T1: D4, SLC-96, ESF; E1: G.704 multiframe with CRC-4; J1: full support per ANSI T1.107 |
| Jitter Attenuation | Crysal-less, software-selectable on transmit or receive path; meets ITU-T G.823, ETSI ETR 12/13 |
| Termination Options | Software-selectable: 100Ω (T1), 110Ω (J1), 120Ω (E1 twisted pair), 75Ω (E1 coaxial) |
| Rx Signal Level Range | –2.5 dB to –36 dB (T1 mode), –2.5 dB to –44 dB (E1 mode), in ~2.5 dB steps |
| Alarm & Diagnostics | Per-port LOS per G.775/T1.231; Tx open/short detection; BERT with repetitive pattern generation |
Pinout & Package
DS26524G+ is housed in a 256-ball TE-CSBGA package (56-G6028-001), 15 mm × 15 mm, 0.8 mm ball pitch, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Master Clock Input | Accepts 1.544 MHz, 2.048 MHz, or integer multiples; used for internal clock adaptation in host mode |
| RSYNC | Receive Frame Sync Input | Synchronizes receive-side framing to external timing source in H.100 CT Bus mode |
| TSSYNCIO | Transmit Sync I/O | Configurable as input or output for transmit-side synchronization in CT Bus applications |
| IBO[0:7] | Interleave Bus Output | 8-bit time-division multiplexed data bus supporting H.100 (CT Bus) backplane interface |
| IBI[0:7] | Interleave Bus Input | 8-bit TDM backplane data input aligned to RSYNC; enables bidirectional CT Bus connectivity |
| LOS[0:3] | Line Out-of-Service Indicator | Active-low per-port LOS signal compliant with G.775, ETS 300 233, and T1.231 |
| ALARM[0:3] | Alarm Status Output | Per-port alarm flag indicating AIS, RAI, LOF, or other framer-detected conditions |
Key Features
| Feature | Design Value |
|---|---|
| T1-to-E1 Conversion | Enables protocol translation between T1 and E1 networks without external bridging logic |
| Software-Selectable Termination | Eliminates external resistor networks; supports 75Ω/100Ω/110Ω/120Ω line impedances per port |
| H.100 (CT Bus) Compatibility | Direct integration into legacy telecom backplanes using standard 8-bit interleaved TDM format |
| Per-Port Loopback Modes | Analog, local, remote, and dual loopbacks for isolation and diagnostics at each of four ports |
| HDLC Controllers | Dedicated HDLC receive/transmit engines per port for embedded signaling and maintenance channel handling |
Applications
| Channel Service Unit (CSU) | Data Service Unit (DSU) |
|---|---|
Use Scenario: Provides line termination, framing, and alarm monitoring for T1/E1 leased-line connections in enterprise edge routers. IC Role / Device Role / Timing Role: Acts as primary framer/LIU, performing T1 D4/ESF or E1 G.704 framing, LOS detection, and AIS/RAI insertion. Use Value: Enables single-chip CSU implementation with software-configurable line impedance and jitter attenuation meeting Telcordia GR-499-CORE. |
Use Scenario: Embedded in carrier-class DSUs to handle protocol conversion, clock recovery, and maintenance signaling for WAN handoff points. IC Role / Device Role / Timing Role: Performs T1-to-E1 conversion, HDLC-based OAM messaging, and precise receive-signal-level monitoring. Use Value: Reduces BOM count by integrating framer, LIU, jitter attenuator, and backplane interface - eliminating discrete clock cleaners and glue logic. |
| Telecom Access Switch | T1/E1 Test Equipment |
Use Scenario: Used in modular access switches aggregating multiple T1/E1 lines into IP/MPLS core networks. IC Role / Device Role / Timing Role: Serves as line-card PHY, providing per-port framing, elastic store buffering, and H.100 CT Bus interfacing to switch fabric. Use Value: Supports hot-swappable line cards with deterministic latency via elastic store control and gapped-clock transmit/receive fractional support. |
Use Scenario: Core component in portable T1/E1 analyzers verifying signal integrity, jitter, framing alignment, and alarm response. IC Role / Device Role / Timing Role: Functions as programmable transceiver with built-in BERT, loopback modes, and real-time Rx level reporting. Use Value: Delivers lab-grade diagnostics including bit-error-rate testing, in-band loop code generation/detection, and CRC-4 intermediate updating per G.706. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad T1/E1 framer/LIU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS36954G+ | Single-port T1/E1 framer/LIU; lacks multi-port integration, H.100 interface, and T1-to-E1 conversion | Targeted at low-density line cards or cost-sensitive point solutions requiring only one channel | Select DS26524G+ when four independent T1/E1 ports, backplane TDM support, and protocol conversion are required. |
| MAX5863ETM+ | Quad T1/E1 transceiver only (no framer); requires external framer or FPGA-based framing logic | Suitable for designs where framing is handled upstream (e.g., DSP or SoC), prioritizing analog LIU performance over integration | Choose DS26524G+ when full framer+LIU integration, embedded HDLC, and alarm processing are needed in one device. |
Compared with DS36954G+ and MAX5863ETM+, the DS26524G+ uniquely combines four complete framer/LIU channels, H.100 CT Bus interface, T1-to-E1 conversion, and crystal-less jitter attenuation - reducing system-level complexity and PCB area in multi-port telecom line cards.
Availability
DS26524G+ is available at Aetrix Electronics and suitable for channel service units (CSUs), data service units (DSUs), and telecom access switches requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS26524G+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, computing, and industrial systems.
The DS26524G+ belongs to Maxim's telecom framer/LIU product line, designed specifically for carrier-grade T1/E1/J1 line interface and framing in CSUs, DSUs, muxes, and test equipment.
FAQ
What is the operating temperature range for DS26524G+?
The DS26524G+ is rated for commercial temperature operation from 0°C to +70°C. This specification is confirmed in the official Maxim ordering information table, where DS26524G+ is explicitly listed with that temperature grade. It uses the same 256-ball TE-CSBGA package as the industrial-grade DS26524GN+ (–40°C to +85°C), but is screened and tested to meet the narrower commercial range. DS26524G+ is not qualified for extended temperature use.
Does DS26524G+ support both T1 and E1 framing simultaneously across its four ports?
Yes, DS26524G+ supports independent framing mode selection per port: any combination of T1 (D4, SLC-96, ESF), E1 (G.704 with CRC-4), or J1 can be configured concurrently. This per-port configurability is a core feature documented in the General Description and Features sections. Each channel's framer operates autonomously, enabling mixed-mode line cards - for example, two ports in T1 ESF mode and two in E1 CRC-4 mode - without hardware reconfiguration.
What termination impedances does DS26524G+ support, and how are they selected?
DS26524G+ supports 100Ω (T1 twisted pair), 110Ω (J1 twisted pair), 120Ω (E1 twisted pair), and 75Ω (E1 coaxial) line terminations. Selection is fully software-controlled via internal registers - no external resistors or solder jumpers are required. This capability is explicitly stated in the Features section and enables field-reprogrammable line interface adaptation, simplifying inventory management and design reuse across regional T1/E1/J1 deployments.
Is DS26524G+ compatible with H.100 (CT Bus) backplane interfaces?
Yes, DS26524G+ provides native H.100 (CT Bus) compatibility through its IBO[0:7] and IBI[0:7] interleave bus signals, elastic store buffering, and RSYNC/TSSYNCIO timing controls. The Functional Description section confirms H.100 support in subsection 8.8.3, and timing diagrams (Figures 8-6, 8-7) detail CT Bus synchronization behavior. This allows direct connection to legacy telecom switch fabrics without external glue logic or clock domain translators.
What jitter attenuation standards does DS26524G+ meet?
DS26524G+ meets ITU-T G.736, G.742, G.823, and AT&T Pub 62411 jitter attenuation requirements when its crystal-less jitter attenuator is enabled on either transmit or receive path. This is explicitly cited in the Features section and validated in the Specifications Compliance chapter. The attenuator operates without external VCXO or PLL components, delivering compliant performance across T1 and E1 data rates within the device's specified temperature and voltage ranges.
DS26524G+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 256-LBGA, CSBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Line Interface Unit (LIU)
- Interface:
- LIU
- Number of Circuits:
- 4
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 260mA
- Power (Watts):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CSBGA (17x17)
DS26524G+ FAQ
1.How can I place an order for DS26524G+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26524G+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS26524G+ reliable?
The price and inventory of DS26524G+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26524G+ is usually 5 days.
3.What payment methods are accepted for DS26524G+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26524G+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26524G+?
DS26524G+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26524G+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS26524G+?
For technical support, including DS26524G+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26524G+ requirements.
6.How does Aetrix verify that DS26524G+ is sourced from the original manufacturer or authorized distributors?
All DS26524G+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS26524G+ meets industry standards.
7.What is the process for return or replacement of DS26524G+?
All DS26524G+ units undergo pre-shipment inspection (PSI). If there is an issue with DS26524G+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS26524G+ part is unused and in its original packaging.
Return procedure for DS26524G+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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